$2.)$ A solution containing $A$ at a concentration of $0\mathrm{.}56mo\frac{l}{L}$ is fed into a tubular reactor with a

volumetric flow rate of $1\mathrm{.}36\frac{L}{m}in.$ The reaction rate constant is given as $0\mathrm{.}25\frac{m^3}{m}ol.$s$.$ The

reactor length and diameter are $3\mathrm{.}9m$ and $0\mathrm{.}18m,$ respectively. The reactor is operated under

steady state conditions.

a$)$ Perform a mass balance for reactant $A.$

b$)$ Solve the mass balance with MATLAB to predict the concentration profile with appropriate

assumptions.